nucleo-l412kb: remove obsolete spi_divtable include
nucleo-l412kb: remove obsolete spi_divtable include

ant9000/RIOT,OlegHahm/RIOT,kYc0o/RIOT,OTAkeys/RIOT,OlegHahm/RIOT,kYc0o/RIOT,RIOT-OS/RIOT,jasonatran/RIOT,RIOT-OS/RIOT,OTAkeys/RIOT,OTAkeys/RIOT,OlegHahm/RIOT,authmillenon/RIOT,kYc0o/RIOT,OlegHahm/RIOT,kaspar030/RIOT,jasonatran/RIOT,OTAkeys/RIOT,authmillenon/RIOT,miri64/RIOT,miri64/RIOT,jasonatran/RIOT,kaspar030/RIOT,authmillenon/RIOT,jasonatran/RIOT,ant9000/RIOT,OlegHahm/RIOT,ant9000/RIOT,RIOT-OS/RIOT,authmillenon/RIOT,authmillenon/RIOT,RIOT-OS/RIOT,miri64/RIOT,OTAkeys/RIOT,kaspar030/RIOT,ant9000/RIOT,miri64/RIOT,kaspar030/RIOT,miri64/RIOT,kYc0o/RIOT,authmillenon/RIOT,ant9000/RIOT,kaspar030/RIOT,RIOT-OS/RIOT,kYc0o/RIOT,jasonatran/RIOT